Surrounding rock control mechanism of deep coal roadways and its application  

作　　者：Xie Shengrong Li Erpeng Li Shijun Wang Jinguang He Chongchong Yang Yafeng 

机构地区：[1]Faculty of Resource & Safety Engineering, China University of Mining & Technology

出　　处：《International Journal of Mining Science and Technology》2015年第3期429-434,共6页矿业科学技术学报（英文版）

基　　金：provided by the National Natural Science Foundation of China(No.51234005);National Basic Research Program of China under Grant(No.2010CB226802);Fundamental Research Funds for the Central Universities(No.2010QZ06)

摘　　要：Aiming at the surrounding rock control problem of mining and preparation entries in Xingdong mine with large mining depth, and the comprehensive control countermeasures including high pre-stress cable truss system, this study put forward powerful anchor support system and anchor cable adaption technology to surrounding rock deformation. Furthermore, the control measures possess the supporting performance with ‘‘primary rigid-following flexible-new rigid, and primary resistance-following yield-new resistance'', which suits deep roadway surrounding rock control. The mechanical model of truss anchor supporting roof beams was established, and the inverted arch deflection produced by the cable pre-stress with stress increment effect and roof beam deflection were obtained. And then the system working mechanism was illustrated. Finally, the surrounding rock support parameters were determined by means of comprehensive methods, and put into practice. The results show that surrounding rock deformation realized secondary stability after three months. The roadway sides convergence value was less than 245mm, and roof subsidence was less than 124mm. In addition, there was no expansion and renovation during service period.Aiming at the surrounding rock control problem of mining and preparation entries in Xingdong mine with large mining depth, and the comprehensive control countermeasures including high pre-stress cable truss system, this study put forward powerful anchor support system and anchor cable adaption technol-ogy to surrounding rock deformation. Furthermore, the control measures possess the supporting perfor-mance with ‘primary rigid-following flexible-new rigid, and primary resistance-following yield-new resistance’ , which suits deep roadway surrounding rock control. The mechanical model of truss anchor supporting roof beams was established, and the inverted arch deflection produced by the cable pre-stress with stress increment effect and roof beam deflection were obtained. And then the system working mechanism was illustrated. Finally, the surrounding rock support parameters were determined by means of comprehensive methods, and put into practice. The results show that surrounding rock deformation realized secondary stability after three months. The roadway sides convergence value was less than 245 mm, and roof subsidence was less than 124 mm. In addition, there was no expansion and renovation during service period.

关 键 词：Deep coal roadway Truss system Inverted arch deflection Equivalent uniform load Powerful anchor support 

分 类 号：TD353[矿业工程—矿井建设]